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AristaCVE-2021-28505

HistoryApr 14, 2022 - 9:15 p.m.

CVE-2021-28505

2022-04-1421:15:08

CWE-284

CWE-863

Arista

web.nvd.nist.gov

arista

eos

vxlan

ipv4

access list

ip protocol

security vulnerability

nvd

cve-2021-28505

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:L/Au:N/C:N/I:P/A:N

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS

0.001

Percentile

33.9%

JSON

On affected Arista EOS platforms, if a VXLAN match rule exists in an IPv4 access-list that is applied to the ingress of an L2 or an L3 port/SVI, the VXLAN rule and subsequent ACL rules in that access list will ignore the specified IP protocol.

Affected configurations

Nvd

Node

aristaccs-710p-12Match-

aristaccs-710p-16pMatch-

aristaccs-720xp-24y6Match-

aristaccs-720xp-24zy4Match-

aristaccs-720xp-48y6Match-

aristaccs-720xp-48zc2Match-

aristaccs-720xp-96zc2Match-

aristaccs-722xpm-48y4Match-

aristaccs-722xpm-48zy8Match-

aristadcs-7010tx-48Match-

aristadcs-7050cx3-32sMatch-

aristadcs-7050cx3m-32sMatch-

aristadcs-7050sx3-48c8Match-

aristadcs-7050sx3-48yc12Match-

aristadcs-7050sx3-48yc8Match-

aristadcs-7050sx3-96yc8Match-

aristadcs-7050tx3-48c8Match-

AND

aristaeosRange4.26–4.26.4m

aristaeosRange4.27–4.27.1f

VendorProductVersionCPE
aristaccs-710p-12-cpe:2.3:h:arista:ccs-710p-12:-:*:*:*:*:*:*:*
aristaccs-710p-16p-cpe:2.3:h:arista:ccs-710p-16p:-:*:*:*:*:*:*:*
aristaccs-720xp-24y6-cpe:2.3:h:arista:ccs-720xp-24y6:-:*:*:*:*:*:*:*
aristaccs-720xp-24zy4-cpe:2.3:h:arista:ccs-720xp-24zy4:-:*:*:*:*:*:*:*
aristaccs-720xp-48y6-cpe:2.3:h:arista:ccs-720xp-48y6:-:*:*:*:*:*:*:*
aristaccs-720xp-48zc2-cpe:2.3:h:arista:ccs-720xp-48zc2:-:*:*:*:*:*:*:*
aristaccs-720xp-96zc2-cpe:2.3:h:arista:ccs-720xp-96zc2:-:*:*:*:*:*:*:*
aristaccs-722xpm-48y4-cpe:2.3:h:arista:ccs-722xpm-48y4:-:*:*:*:*:*:*:*
aristaccs-722xpm-48zy8-cpe:2.3:h:arista:ccs-722xpm-48zy8:-:*:*:*:*:*:*:*
aristadcs-7010tx-48-cpe:2.3:h:arista:dcs-7010tx-48:-:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
arista	ccs-710p-12	-	cpe:2.3:h:arista:ccs-710p-12:-:::::::*
arista	ccs-710p-16p	-	cpe:2.3:h:arista:ccs-710p-16p:-:::::::*
arista	ccs-720xp-24y6	-	cpe:2.3:h:arista:ccs-720xp-24y6:-:::::::*
arista	ccs-720xp-24zy4	-	cpe:2.3:h:arista:ccs-720xp-24zy4:-:::::::*
arista	ccs-720xp-48y6	-	cpe:2.3:h:arista:ccs-720xp-48y6:-:::::::*
arista	ccs-720xp-48zc2	-	cpe:2.3:h:arista:ccs-720xp-48zc2:-:::::::*
arista	ccs-720xp-96zc2	-	cpe:2.3:h:arista:ccs-720xp-96zc2:-:::::::*
arista	ccs-722xpm-48y4	-	cpe:2.3:h:arista:ccs-722xpm-48y4:-:::::::*
arista	ccs-722xpm-48zy8	-	cpe:2.3:h:arista:ccs-722xpm-48zy8:-:::::::*
arista	dcs-7010tx-48	-	cpe:2.3:h:arista:dcs-7010tx-48:-:::::::*

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CNA Affected

[
  {
    "product": "EOS",
    "vendor": "Arista Networks",
    "versions": [
      {
        "lessThanOrEqual": "4.26.0",
        "status": "affected",
        "version": "4.26.3M",
        "versionType": "custom"
      },
      {
        "lessThanOrEqual": "4.27.0",
        "status": "affected",
        "version": "4.27.0F",
        "versionType": "custom"
      }
    ]
  }
]

References

www.arista.com/en/support/advisories-notices/security-advisories/15267-security-advisory-0073

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:L/Au:N/C:N/I:P/A:N

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS

0.001

Percentile

33.9%

JSON

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